In the present study, the large-scale excavation in the construction is numerically back-analyzed using a soil-water-coupled finite element method with an elasto-viscoplastic model which considers the strain-induced degradation. The measurements o...
Sayuri Kimoto   Babak Shahbodagh Khan   Mojtaba Mirjalili   Fusao Oka   
INTERNATIONAL JOURNAL OF GEOMECHANICS 15(5) 2015年10月 [査読有り]
A cyclic elastoviscoplastic constitutive model for clayey soils is proposed based on the nonlinear kinematic hardening rules and considering the structural degradation. The performance of the model is verified through the undrained triaxial test s...
Hiromasa Iwai   Sayuri Kimoto   Toshifumi Akaki   Fusao Oka   
ENERGIES 8(6) 5381-5412 2015年6月 [査読有り]
It is well known that the methane hydrate dissociation process may lead to unstable behavior such as large ground deformations, uncontrollable gas production, etc. A linear instability analysis was performed in order to investigate which variables...